Detection method and detection system of moving object

A detection method of a moving object, applied to a detection system, wherein the detection system comprises a platform, a stereo camera including a left lens system and a right lens system disposed on the platform, and a processing module, the detection method comprises:

• (a) using the left lens system to capture a first left image and a second left image at a first time and a second time respectively, and using the right lens system to capture a first right image and a second right image at the first time and the second time respectively;
• (b) subdividing the first right image into a plurality of color blocks by the processing module;
• (c) selecting N control points on the first left image, and searching M first corresponding points of the N control points in the first right image, wherein N and M are a positive integer respectively, and M is not greater than N by the processing module;
• (d) calculating depth information according to each of the control points and the corresponding first corresponding point, and calculating a possible area in the second right image in which the M first corresponding points appear according to the depth information by the processing module;
• (e) searching P second corresponding points of the M first corresponding points in the possible area, wherein P is a positive integer not greater than M by the processing module;
• (f) using the first corresponding points and the second corresponding points contained in each color block to calculate a two-dimensional planar conversion parameter of a deformation of the color block generated from the first time to the second time, and using the two-dimensional planar conversion parameter to convert all pixels in the color block to new positions to obtain a converted image by the processing module;
• and
• (g) identifying a difference area between the second right image and the converted image as an area in which the moving object is located by the processing module.